The Spanish giants are still celebrating after signing Brazilian superstar Kaka from AC Milan for a world record £56m.

But new club president Florentino Perez has now promised to move heaven and earth to snatch the World Player of the Year as well.

“I will do everything possible to get Cristiano Ronaldo at Real Madrid,” said Perez. “Kaka is (just) the first signing. We are always thinking about great players.

“Ronaldo is a great player who we would like to bring to the club but first we have to speak to Manchester United because the important thing is for us to maintain a good rapport with everyone.”

United boss Sir Alex Ferguson declared war on Real last summer after their repeated attempts to lure Ronaldo to the Bernabeu.

Ronaldo eventually committed himself to the Premier League champions, with Ferguson later insisting he would not “sell Real a virus”, never mind the best player on the planet.

A pre-contract agreement between Real and Ronaldo has been hinted at but Perez said: “I have read about this but I have been at this club a week and not seen anything about this. What I want most is to keep good relationships with other clubs.”

That seems unlikely now, with United certain to be furious at Perez’s latest attempt to unsettle the Portugal winger.

But Perez is taking a different approach with Liverpool over midfielder Xabi Alonso, who is also on his wish-list.

“He is a great player but he also plays in a big team and I haven’t heard any news that they plan to sell him,” said Perez.

“It’s obvious Rafa Ben-itez is counting on keeping him. That’s normal. He’s a good player and it wouldn’t be easy to replace him.”

Meanwhile, Kaka admits his world record transfer and six-year contract was a done deal long before Real went public.

“The deal was sealed a long time ago,” he said. “I wanted this move to be announced sooner.

“For me, it’s a relief that it has been announced now.

“I’ve been weighing up the offer from Real Madrid a lot. It’s an important project for me to continue growing in my career.

“I’m not going to Real Madrid for money, as I had other offers. The president is already making contact with potential signings and is putting together a competitive team, one which will try to once again become champions in Spain and Europe. That’s why I chose Madrid.”